If a double stranded DNA has 20 per cent of cytosine, calculate the percent of adenine In the DNA.
Answers
Answer:
The percentage of adenine in the DNA would be 30℅.
Explanation:
According to Chargaff's rule, the ratio of purine and pyrimidine bases should be in the ratio of 1:1 ( So Adenine+Thymine= Cytosine+ Guanine).
Since the percentage of cytosine is given as 20℅, we have the percentage of guanine as 20℅ as well ( cytosine base pairs with guanine so both the quantities are the same).
Therefore, the remaining should be adenine+ thymine, which is 100-40℅ = 60℅. As adenine= thymine so the percentage of adenine will be 30℅.
Explanation:
The double standard DNA has an equal number of DNA, it means the base pairs are present in an equal distribution. The 20 percent of cytosine accounts for 20% guanine, as it pairs as cytosine and guanine.
The other pair exist as thymine and adenine, which constituents 60 percent in which adenine is 30 percent and thymine is 30 percent. Hence the adenine is 30 percent in this DNA strand of double-stranded DNA.